| s1 s2 | s1 := 1234 asString. s2 := 1234 asString. s1 = s2. "true" s1 == s2. "false" s1 asSymbol = s2 asSymbol. "true" s1 asSymbol == s2 asSymbol. "true" (s1 class allInstances select: [:s | s = s1 ]) size. "2" (s1 asSymbol class allInstances select: [:s | s = s1 asSymbol ]) size. "1" [ #stringA = #stringB ] bench. "26,812,864 per second" [ 'StringA' = 'StringB' ] bench. "3,492,987 per second" Best regards, Henrik -----Original Message----- From: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] On Behalf Of Ben Coman Sent: Friday, April 8, 2016 3:23 AM To: Any question about pharo is welcome <pharo-users@lists.pharo.org> Subject: Re: [Pharo-users] Pharo-users Question about the symbols A symbol is like a string, except that all symbols with the same value are in fact the same object; that is, every #hello symbol is the exact same object as every other #hello symbol. See "identically equal" section here... http://sdmeta.gforge.inria.fr/FreeBooks/ByExample/08%20-%20Chapter%206%20-%2... cheers, ben On Fri, Apr 8, 2016 at 7:20 AM, Valentin Ryckewaert <valentin.ryckewaert@gmail.com> wrote:
Hello everyone,
i'm learning Pharo and i'm having difficulties to understand the symbols, what are they? How are they different of the ByteString ? Why are they usefull ? Why should I put #string where I can put 'string' ?
Thanks in advance for your answer. Valentin Ryckewaert